Broad-band Terahertz Polarization Conversion in a Planar Metasurface

We numerically investigated a broad-band polarization conversion of linearly polarized THz in a planar metasurface. The unit cell of the proposed MM configuration is comprised of a C-shaped resonator. We studied the co -and cross-polarization transmission of the proposed geometry for different polarizations of the incident light starting from 0
⁰
to 45
⁰
in steps of 15
⁰
. Our design promises a cross-polarization conversion of 40% in a broad frequency spectrum of 1.3 to 3.0 THz when the structure is rotated by 45
⁰
with respect to the incident THz.